2021 CHEVROLET COLORADO oil additives

Chevrolet/GMC 2.8L Duramax Diesel Engine Supplement (GMNA-Localizing-
U.S./Canada-14465442) - 2021 - CRC - 2/3/20
26 Driving and Operating
Caution
Use of fuel that does not comply with
the required technical standards can lead
to engine power loss, increased wear,
or engine damage and may void your
warranty.
Some improper fuels are:
.Diesel fuel with the addition of
gasoline.
.Diesel fuel mixed with engine oil or
automatic transmission fluid.
.Triglyceride fuels, such as raw
vegetable oil or animal fat, in any
form, including with blends of diesel
or biodiesel.
.Marine diesel fuel and fuel oils.
.Diesel-water emulsions, such as
Aquazole.
.Aftermarket diesel fuel additives,
which contain alcohols, organo-metallic
additives, or water emulsifiers.
Caution
If the vehicle is accidentally refueled with
gasoline, do not continue driving the
vehicle. Driving the vehicle will damage
the fuel system. Have the vehicle towed
to a qualified technician to have the
gasoline removed from the tank and fuel
system. Refuel with Ultra Low Sulfur
Diesel fuel. It is also recommended to
have the fuel system flushed with Ultra
Low Sulfur Diesel, to ensure all gasoline
is removed.
Some conditions, such as dirty fuel, may
decrease fuel filter life and a CHANGE FUEL
FILTER message may come on in the Driver
Information Center (DIC).
Climate Grade Diesel Fuels
At temperatures below 0 °C (32 °F), avoid
using biodiesel blends above 5% by volume.
Using such a fuel may cause fuel filter
plugging, system gelling, and freezing, which
may adversely impact vehicle starting.
Severe winter grade diesel fuel, such as 1-D
diesel fuel or Arctic grade diesel fuel, can be
used in extreme cold temperatures (below
−18 °C or 0 °F); however, doing so will reduce power and fuel economy. Avoid
using severe winter grade fuel in warm or
hot climates. It can result in stalling, poor
starting, and damage to the fuel injection
system.
Fuels improperly blended for cold
temperature operation may result in
restricted fuel filters. The vehicle is equipped
with a fuel heating system to prevent
gelling or waxing of conventional diesel fuel
and biodiesel blends, but may not prevent
all cases.
In case of severe winter conditions, the fuel
filter may become clogged by wax naturally
present in the fuel. To unclog it, move the
vehicle to a warm garage area and allow the
filter to warm up. The fuel filter may need
to be replaced. See
Fuel Filter Replacement
0 30.Biodiesel
Biodiesel is a renewable fuel produced from
vegetable oils or animal fats that have been
chemically modified to make it compatible
with diesel fuel.

Chevrolet/GMC 2.8L Duramax Diesel Engine Supplement (GMNA-Localizing-
U.S./Canada-14465442) - 2021 - CRC - 2/3/20
58 Vehicle Care
engine at extremely low temperatures.
When selecting an oil of the appropriate
viscosity grade, it is recommended to select
an oil of the correct specification. See
“Specification”earlier in this section.
Engine Oil Additives/Engine Oil Flushes
Do not add anything to the oil. The
recommended oils meeting the dexos2
specification are all that is needed for good
performance and engine protection.
Engine oil system flushes are not
recommended and could cause engine
damage not covered by the vehicle
warranty.
What to Do with Used Oil
Used engine oil contains certain elements
that can be unhealthy for your skin and
could even cause cancer. Do not let used oil
stay on your skin for very long. Clean your
skin and nails with soap and water, or a
good hand cleaner. Wash or properly
dispose of clothing or rags containing used
engine oil. See the manufacturer's warnings
about the use and disposal of oil products.
Used oil can be a threat to the environment.
If you change your own oil, be sure to drain
all the oil from the filter before disposal. Never dispose of oil by putting it in the
trash or pouring it on the ground, into
sewers, or into streams or bodies of water.
Recycle it by taking it to a place that
collects used oil.
Engine Oil Life System
The engine oil life system calculates engine
oil life based on vehicle use and displays the
CHANGE ENGINE OIL SOON message when it
is time to change the engine oil and filter.
The oil life system should be reset to 100%
only following an oil change. See
“Engine Oil
Life System” in the owner’s manual.
Automatic Transmission Fluid
When to Check and Change (2.8L
4-Cylinder Engine Pickup Models)
See“Automatic Transmission Fluid” in the
owner’s manual.
When to Check and Change (2.8L
4-Cylinder Engine Van Models)
It is not necessary to check the transmission
fluid level. A transmission fluid leak is the
only reason for fluid loss. If a leak occurs,
take the vehicle to your dealer and have it
repaired as soon as possible. There is a special procedure for checking and
changing the transmission fluid. Because this
procedure is difficult, this should be done at
your dealer. Contact your dealer for
additional information.
Change the fluid and filter at the intervals
listed in
Maintenance Schedule 073 or
Maintenance Schedule 077, and be sure to
use the fluid listed in Recommended Fluids
and Lubricants 078.
Engine Air Cleaner/Filter
2.8L 4-Cylinder Engine Pickup Models
See “Engine Air Cleaner/Filter” in the
owner’s manual.
2.8L 4-Cylinder Engine Van Models
The air cleaner/filter assembly is on the
front of the engine compartment on the
driver side of the vehicle. See Engine
Compartment Overview 053.
When to Inspect/Replace the Engine Air
Cleaner/Filter
For intervals on changing and inspecting the
engine air filter, see Maintenance Schedule
0 73 or
Maintenance Schedule 077.

Chevrolet/GMC 2.8L Duramax Diesel Engine Supplement (GMNA-Localizing-
U.S./Canada-14465442) - 2021 - CRC - 2/3/20
86 Index
Exhaust FluidDiesel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
F
Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Replacement (Fuel) . . . . . . . . . . . . . . . . . . . . . 30
Filter,
Engine Air Cleaner . . . . . . . . . . . . . . . . . . . . . . 58
Fluid Automatic Transmission . . . . . . . . . . . . . . . . 58
Fuel Additives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Biodiesel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Cold Weather Operation . . . . . . . . . . . . . . . . 27
Diesel Engines . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Filling a Portable Fuel Container . . . . . . . . 34
Filling the Tank . . . . . . . . . . . . . . . . . . . . . . . . . 32
Filter Replacement . . . . . . . . . . . . . . . . . . . . . . 30
Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Operated Heater (FOH) . . . . . . . . . . . . . . . . . 19
Running out of Fuel . . . . . . . . . . . . . . . . . . . . 30
Top Tier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Water in Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Fuel for Diesel Engines . . . . . . . . . . . . . . . . . . . . .25
Fuses Engine Compartment Fuse Block . . . . . . . . 64
G
Gauges
Engine Oil Pressure . . . . . . . . . . . . . . . . . . . . . . 8
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
General Information
Service and Maintenance . . . . . . . . . . . . . . . 72
H
HeaterEngine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Fuel Operated . . . . . . . . . . . . . . . . . . . . . . . . . . 19
I
Instrument Cluster . . . . . . . . . . . . . . . . . . . . . . . . . 4
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
L
LampsMalfunction Indicator (Check Engine) . . . . 9
Lights Check Engine (Malfunction Indicator) . . . . 9
Diesel Exhaust Fluid (DEF) . . . . . . . . . . . . . . 10
Power Take-off . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Wait to Start . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
M
Maintenance
Records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Maintenance Schedule . . . . . . . . . . . . . . . . . 73, 77 Maintenance Schedule (cont'd)
Recommended Fluids and Lubricants . . . . 78
Malfunction Indicator Lamp . . . . . . . . . . . . . . . . 9
O
Oil Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Engine Oil Life System . . . . . . . . . . . . . . . . . . 58
Engine Oil Pressure Gauge . . . . . . . . . . . . . . . 8
Overheating, Engine . . . . . . . . . . . . . . . . . . . . . . 62
P
Parking Over Things That Burn . . . . . . . . . . . . . . . . . . 19
Personalization Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Power Take-Off (PTO) . . . . . . . . . . . . . . . . . . . . . .37
Power Take-Off Light . . . . . . . . . . . . . . . . . . . . . 10
R
Recommended Fluids and Lubricants . . . . . . 78
Records Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Replacement Parts Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Routing, Engine Drive Belt . . . . . . . . . . . . . . . . 84
Running out of Fuel . . . . . . . . . . . . . . . . . . . . . . 30